Bubble blowing pen cap



FIG. 1 is a front elevational view of a bubble blowing pen cap showingmy new design, the portions depicted by means of broken lines beingshown for illustrative purposes only and forming no part of the claimeddesign;

FIG. 2 is a rear elevational view of FIG. 1;

FIG. 3 is an alternate front elevational view of FIG. 1;

FIG. 4 is a left side view of the bubble blowing pen cap;

FIG. 5 is a right side view of FIG. 4 ;

FIG. 6 is a top view of FIG. 4 ; and,

FIG. 7 is a bottom view of FIG. 4 .

The ornamental design for a bubble blowing pen cap, as shown anddescribed.